PDCD1 and scleritis: Further analysis of the changes of Treg cell population, IL-10, Th17 cell population, Th17/Treg, IL-6, TNF-α, and other indicators in the scleritis group indicates that the correlation between the activation of T cells and the expression of related inflammatory factors in scleritis after PD-1 carrelizumab treatment should be explored in-depth.